Garmin BlueNet 30 Gateway Marine Electronic Accessory - The Garmin BlueNet 30 gateway is required for Garmin BlueNet network compatible devices to network with legacy Garmin marine devices. Through this gateway you can connect a Garmin BlueNet network to a legacy Garmin Marine Network for a premium control experience. You will only need one gateway to connect the two networks. In The Box: Garmin BlueNet 30 Gateway Power cable Mounting hardware Garmin BlueNet network cable (2 meters) Documentation